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[ Upstream commit6163a985e5] efifb_probe() will issue an error message in case the kernel is booted as Xen dom0 from UEFI as EFI_MEMMAP won't be set in this case. Avoid that message by calling efi_mem_desc_lookup() only if EFI_MEMMAP is set. Fixes:38ac0287b7("fbdev/efifb: Honour UEFI memory map attributes when mapping the FB") Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
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